Stream.EndWrite Method
Ends an asynchronous write operation. (Consider using WriteAsync instead; see the Remarks section.)
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Parameters
- asyncResult
- Type: System.IAsyncResult
A reference to the outstanding asynchronous I/O request.
| Exception | Condition |
|---|---|
| ArgumentNullException | asyncResult is null. |
| ArgumentException | A handle to the pending write operation is not available. -or- The pending operation does not support writing. |
| InvalidOperationException | asyncResult did not originate from a BeginWrite method on the current stream. |
| IOException | The stream is closed or an internal error has occurred. |
In the .NET Framework 4 and earlier versions, you have to use methods such as BeginWrite and EndWrite to implement asynchronous I/O operations. These methods are still available in the .NET Framework 4.5 to support legacy code; however, the new async methods, such as ReadAsync, WriteAsync, CopyToAsync, and FlushAsync, help you implement asynchronous I/O operations more easily.
EndWrite must be called exactly once on every IAsyncResult from BeginWrite.
This method blocks until the I/O operation has completed. Errors that occur during an asynchronous write request, such as a disk failure during the I/O request, occur on the thread pool thread and become visible upon a call to EndWrite. Exceptions thrown by the thread pool thread will not be visible when calling EndWrite.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
